Ski binding



FIG. 1 is a perspective view of a ski binding, showing our new design;

FIG. 2 is a top view thereof; and,

FIG. 3 is a side elevation view thereof.

The broken lines are for environmental purposes only and form no part of the claimed design.

The bottom of the ski binding does not form part of the claim. 

We claim the ornamental design for a ski binding, as shown and described. 